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From: Stefan Haller <stefan@haller-berlin.de>
To: Pratyush Yadav <me@yadavpratyush.com>
Cc: serg.partizan@gmail.com, git@vger.kernel.org
Subject: Re: [PATCH v2] git-gui: use gray background for inactive text widgets
Date: Fri, 18 Dec 2020 14:01:11 +0100	[thread overview]
Message-ID: <90975583-17ad-0d53-5919-fe1c8400291c@haller-berlin.de> (raw)
In-Reply-To: <20201218125025.gj277jwxrblqp45b@yadavpratyush.com>

On 18.12.20 13:50, Pratyush Yadav wrote:
> On 17/12/20 11:14PM, Stefan Haller wrote:
>> On 17.12.20 22:49, Pratyush Yadav wrote:
>>> Hi,
>>>
>>> On 24/11/20 10:23PM, Stefan Haller wrote>>>> +proc convert_rgb_to_gray {rgb} {
>>>> +	# Simply take the average of red, green and blue. This wouldn't be good
>>>> +	# enough for, say, converting a photo to grayscale, but for this simple
>>>> +	# purpose of approximating the brightness of a color it's good enough.
>>>> +	lassign [winfo rgb . $rgb] r g b
>>>
>>> Is there no simpler way to extract r, g, and b? This is a little cryptic 
>>> to be honest.
>>
>> Actually, I find this pretty elegant, and from what I have seen, it's
>> idiomatic Tcl. A less cryptic way would be (untested):
>>
>>   set components [winfo rgb . $rgb]
>>   set r [lindex $components 0]
>>   set g [lindex $components 1]
>>   set b [lindex $components 2]
>>
>> But I much prefer the one-line version.
> 
> I agree. Using lassign is much neater. But that is not my point. I am 
> talking about the "[winfo rgb . $rgb]". This call generates the list 
> that is then assigned to the 3 variables. This part is a little cryptic. 
> Is there no simpler way to separate out the r, g, and b values?
According to the winfo man page this is the only way to do this;
see [1].

Instead of the lassign, you can also do

  foreach {r g b} [winfo rgb . $rgb] {}

but I don't think that's better.

-Stefan


[1] https://www.tcl.tk/man/tcl8.6/TkCmd/winfo.htm

  reply	other threads:[~2020-12-18 13:03 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-24 15:48 [PATCH] git-gui: Basic dark mode support Serg Tereshchenko
2020-08-25 19:01 ` Matthias Aßhauer
2020-09-22 11:04 ` Pratyush Yadav
2020-09-26 14:54   ` [PATCH v2] " Serg Tereshchenko
2020-10-07 11:07     ` Pratyush Yadav
2020-10-08  8:24       ` [PATCH] " Serg Tereshchenko
2020-10-08 13:07     ` [PATCH v2] " Pratyush Yadav
2020-11-21 17:47       ` Stefan Haller
2020-11-22 12:30         ` serg.partizan
2020-11-22 13:32         ` [PATCH] git-gui: Fix selected text colors Serg Tereshchenko
2020-11-22 15:41           ` Stefan Haller
2020-11-22 17:16             ` serg.partizan
2020-11-23 11:48               ` [PATCH] git-gui: use gray selection background for inactive text widgets Stefan Haller
2020-11-23 13:13                 ` serg.partizan
2020-11-23 19:03                   ` Stefan Haller
2020-11-23 20:08                     ` serg.partizan
2020-11-29 17:40                 ` Stefan Haller
2020-11-30 13:41                   ` serg.partizan
2020-11-30 18:08                     ` [PATCH] git-gui: use gray selection background for inactive text?? widgets Pratyush Yadav
2020-11-30 20:18                       ` [PATCH] git-gui: use gray selection background for inactive text widgets Stefan Haller
2020-11-30 20:18                         ` [PATCH] git-gui: keep showing selection when diff view gets deactivated on Mac Stefan Haller
2020-11-23 19:03               ` [PATCH] git-gui: Fix selected text colors Stefan Haller
2020-11-23 20:50                 ` serg.partizan
2020-11-24 21:19                   ` Stefan Haller
2020-11-24 21:23                     ` [PATCH v2] git-gui: use gray background for inactive text widgets Stefan Haller
2020-12-17 21:49                       ` Pratyush Yadav
2020-12-17 22:14                         ` Stefan Haller
2020-12-18 12:50                           ` Pratyush Yadav
2020-12-18 13:01                             ` Stefan Haller [this message]
2020-12-18  9:43                         ` [PATCH v3] " Stefan Haller
2020-12-18 12:51                           ` Pratyush Yadav
2020-12-18 19:46                           ` Pratyush Yadav
2020-12-17 20:23           ` [PATCH] git-gui: Fix selected text colors Pratyush Yadav
2020-10-07 11:13 ` [PATCH] git-gui: Basic dark mode support Pratyush Yadav
2020-10-08  8:20   ` Serg Tereshchenko
2020-10-08  8:28     ` Pratyush Yadav
2020-10-08  8:44       ` Serg Tereshchenko

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